Improvement in dovetailing-machines



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DEERICK JORDAN, OF CHARLESTOWN, MASSACHUSETTS, ASSIGNOR TO A. YS'. & J. GEAR & CO., OF NEW HAVEN, CONNECTICUT.

Letterslatent No. 99,446, dated February 1, 1870.

INIPROVEMENT IN DOVETAILING-MACHINES.

The Schedule referred to in these Lettersv Patent and making part of the same.

To aZ'l` whom it may concern.

Be it knownthat I,DEDRICK JORDAN, of Charlestown, in the county of Middlesex, and State of Massachusetts, have invented a new Improvement in Dovetailing-Apparatus; and I do hereby declare the following, when taken inconnection with' the accompanying.

ing what is known as blind-dovetailing.)

Figure 7, a side view.

Figure 8, a bottom` view.

Figures 9 andlO, longitudinal sections, illustrating the manner of forming the common or open dovetails.

Figures 11,12, and 13, the arrangement ofthe solid cutters, and

Figure 14, the arrangement of the cutter-knives for doing the same.

This invention is designed as an attachment for the machine known as the Gear Moulding-Machine, patented November 8, 1853, and extended for seven years,` the object being to dovetail `the work upon the said machine; and

. The invention consists in the construction of a form or pattern, so that by the same form or pattern, a dovetail tenori and uiortise may both be formed.

I willl proceed, first,4 to describe the apparatus for blind dovetailing, as illustrated in g. 1 to iig. 6, 'inelusive.

A is the form of pattern, constructed with projections, a, and recesses, b, the said recesses andprojections corresponding the one to the other.

'lhe said form is arranged in a clamping-frame, B, so that one piece of wood, C, for the tenen-part, may be set in vertically, the other part, D, for the blindmortise, set in at right anglesto the part C, as seen in iig. 4, and the two parts securely held by a clamp, I), acted upon by a screw, E.

The work thus held upon theform is placed upon the machine, so as to pass on to the guide and cutter, as seen in hg.V 13, the guide passing intothe recesses b, and, as the form is moved, working around the projections into a second recess,.aud so on.

Thercutter,passing through the piece C, cutsthe tenons, as seen in iig. 6, andY passing still further, cuts the mortise, as seen inig. 5. 4The end of the mortise being inclined, as'at f, figyl,` corresponds to the inclination of the'cutter; themas the form passes out from the recess around the end of thel projection j, the tenon will be dressed around the outside, corresponding to the former, and inclination of the mortise, as seen in tig. 4, and thus continuing until the whole width of the work has been dovetailed, then the parts removed, and they will iit togetherriu the most perfect manner.

The depth of the niortise is governed by a guide, F, arranged upon the bottom of theform A, so as to be moved longitudinally thereon, and xed by a setscrew, n. l

This guid is moved forward, so that the cutter can enter the recesses b only `the required distance, as seen in iig. 4. v

It should here be remarked that the outside of the verticalV part C should in position correspond to the extremeends of the projections a, as seen in fig. 4

By thisconstructiomboth parts are dovetailed at the sameoperation.

I will now proceed to describe the manner of making common dovetails.

H is a form, substantially the same as the form A, with this diiiereuce; that the projections a instead ot' being bevelledfat their ends, are bevelled corresponding to the bevel of the mortise, and the two pieces I and L, to be Vdovetailed, are arranged vertically over the forni, and clamped therein by a set-screw, N, and but one part can be dovetailed at the same time, say that of the tenons L.

- This part is set down on to the form, so as to come back of the bevelled portions of the projections a, where the recess is parallel, as seen in iig. 8.

The same cutters as before described, as shown in figs. 12 and 13, are used, and the former passed on'to the cutter in like manner as before. The cutter, luuning entirely through the wood, cuts the common dovetail tenon, passing from recess to recess. until all the tenons arecut.

'Ifo out the other part or mortise, I, a straight cutf ter, as seen in g. 11 is required, and the piecezto be cut is placed upon the bevelled portion of the projection (t, then the former passed on to the cutter, through the several recesses, until all are cut. the two parts correspond to each other, as in common dovetailing. p

The cutters S, shown in figs. 11 and 12, are cylindrical in form, the one of e'qual diameter, and the other an inverted cone, the 'cutting-edge being'fornied by taking away a portion of the metal, and the cutter, Ais held on to the spindle by a conically-headed screw,

M, fitting a corresponding'conically-shaped seat in the cutter; or the cutters may be in the form of knives, clamped into a cutter-head, as in iig. 14, in similar manner as in the gear moulding-machine.

I am aware of the patent of Hazard Knowles, Jan'- nary 2, 1865,`or planing-machine, and do not broadly claim the use of conical-headed bolts for the purpose of securing the cutter-head to the arbor.

I claim as my invention- 1'. The form or pattern, constructed substantially as hereinlelcribed, and combined with the clampingdevice to hold the two pieces to be dovetailed,and so as to be presented to the cutter and guided `around the same, in the manner set forth.

2. In combination with the form or pattern, constructed as herein described, the cutters S, constructed lso as to be attached to the spindlev by the conicalheaded screw M, that portion of the` spindle beneath the head forming the guide, against which the former is moved, as herein described.

DEDRIGK JORDAN.

Witnesses:

P. E. B/IAPJJJIN, JOHN H. BUTLER. 

